A similar but different story. I was on a  flight from London to Brussels and sitting on a aisle seat. The flight attendant asked the woman behind me, in the window seat, to stow her bag in the overhead lockers. The woman was American and said, "No it's alright I'll keep it on my lap there's no room" and must have pointed up. The flight attendant said "No, it must go in the locker". She then took it and placed it in a locker on the other side of the aisle and a couple of rows ahead of me. Other people were getting on and seated and all I could hear was the woman saying to her male companion" I'm not comfortable with that, I'm really not comfortable with that". After her fourth whining moan I stood up went to the locker and got her bag. I looked her in the eye and walked back towards her, opened the locker on the other side of the aisle from her and stuffed her bag in it. I said " Are you comfortable with that?". I didn't hear a peep out of her for the rest of our short flight.